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4150 steel also sold under the name AISI/SAE 4150, is a medium/high-carbon alloy steel that contains chromium and molybdenum. 4150 steel is known for its increased hardenability and mechanical properties. The machinability of 4150 steel bar is better in the annealed form. This tough steel alloy offers uniform strength, wear resistance, and great hardness. It is important to note that Alloy Steel 4150 must be heat-treated to be suitable for machining. The weldability of Alloy Steel 4150 is high and can be achieved through most commercial methods. The finest of grain size relates directly with the temperature of forging.
Chemical composition
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
|
0.48-0.53 |
0.15-1.35 |
0.75-1.00 |
max 0.035 |
max0.040 |
0.8-1.1 |
0.15-0.25 |
Mechanical Properties
|
Diameter (mm) |
≤16 |
16-40 |
40-100 |
100-160 |
160-250 |
|
Yiled
Strength |
≥900 |
≥780 |
≥700 |
≥650 |
≥550 |
|
Tensile
Strength |
1100-1300 |
1100-1300 |
1000-1200 |
900-1100 |
850-1050 |
|
Elongation(%) |
≥9 |
≥10 |
≥12 |
≥13 |
≥13 |
|
Impact(J) |
≥30 |
≥30 |
≥30 |
≥30 |
≥30 |
|
Hardness（HB) |
331-380 |
298-359 |
271-331 |
253-298 |
240-286 |
Application
Alloy Steel 4150 is used in the aerospace, defense, oil and gas, and automotive industries for products such as:
Shafts
Valves
Sprockets
Aerospace parts
Axles
Spindles
Forged gears
